DOES ANYONE KNOW THE CORRECT WAY TO CLEAN OLDER BLADES AND HANDLES? I'M NOT SURE IF COMMERCIAL CLEANERS CAN STAIN OR SCRATCH.I HAVE SEVERAL I WOULD LIKE TO BUFF SMALL SCRATCHES OUT OF, BUT DON'T WANT TO MAKE THEM WORSE. IS BRASS CLEANER FINE FOR THE BRASS? THANKS FOR YOUR OPINIONS-
